Code Definition

B100D — Column Lock Authorisation – Missing Message

System: Body  |  Type: Manufacturer-Specific  |  Make: Jaguar

About B100D

B100D is a manufacturer-specific body diagnostic trouble code recorded for Jaguar vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

Scanning & clearing: Body (B) codes are often stored in the body control module, airbag module, or climate module. A basic OBD-II tool usually will not read body codes — an enhanced or OEM-level scan tool is typically required.

B100D is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

Jaguar vehicles fitted with keyless start and an Electric Steering Column Lock (ESCL) use the Body Control Module (BCM) to request the ESCL to lock or unlock via the CAN network. Authorisation of the lock/unlock event is confirmed by a response message from the ESCL itself, cross-checked with the Instrument Cluster and Central Junction Box to ensure the request is legitimate. DTC B100D is set when the BCM issues a lock or unlock command but does not receive the expected CAN authorisation message within its calibrated timeout, while system voltage is within the normal 9–16V range and the igni...

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